-tree c-tec ccccc cccii ccett cciii ccitt ceci- cecie cecri ceere ceirt cerc- cerce cerci cerec cerer ceret ceric cerie cerre certe cetic cette cicer cietc circe ciric cirie cirr- cirri citec citee citer citie citr- citte crece creer crete crice crier ctree cttee ecrit eeeee eerie eetti eirie eiter eitri erect erere erice erier eriic erite erte erter etete etite etree etter ettie ice-t iceci iceit icici icier icter ictic iecee ieiri ierei iette iiiee iiiii iitti ircii irece irete irite irrit irtec itete itire itter ittre ittti rcirc recce recet recit rect- recte recti reece reere reeti reice rere- reree reret reric rerir retee reter retie rette ricci ricer rieti ririe rtice tecic terce teret terre terri tert- teter tetr- tetri tette ti-ti ticci ticer tieit tiere tieri tiree tirer tiret tirit titcr titer titii titre titte titti treer treet treie treit trere treri trete trett trice triei trier triet trit- trite tritt ttttt